explain why it is easier to hang a shopping bag from the crook of your elbow than to carry it suspended from your hand with your arm at 90 degree angle.

A pelican flying drops a fish from a height of 8.1 m. The fish travels 9.3 m horizontally before it hits the ground. The pelican's speed was

A fish can travel 30km/h in still water. How long will it take to arrive 12km downstream in a river flowing 6km/h?

Assume your mass is 60 kg. The acceleration due to gravity is 9.8 m/s 2. How much work against gravity do you do when you climb a flight of stairs 2.9 m high? Answer in units of J.

How does the Sun release nuclear energy? through the fusion of a uranium nucleus into smaller nuclei through the fusion of hydrogen nuclei into a heavier nucleus through the fission of a uranium nucleus into smaller nuclei through the fission of

What is the best description of a wave? A) a vibration that carries energy B) a disturbance that moves matter C) a medium disturbed by a vibration D) matter that is moved from one place to another

Briefly describe why these searches suggest that star-like (our planet-like) objects and black holes cannot account for all the dark matter in the halo of our galaxy.

What two units of measurement are necessary for describing speed?

If 3,600 J of work is done in 3.0 s, what is the power? 0.00083 W 1,200 W 3,600 W 11,000 w

Julia rides her horse 12 miles in 45 minutes. What is her average speed in mi/min? Show Your Work.

What happens to the inertia of an object of its mass is decreased?